Use std::default_delete as the default deleter for scoped_ptr.

components/memory_pressure/filtered_memory_pressure_calculator.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/memory_pressure/filtered_memory_pressure_calculator.h"
 
+#include <algorithm>
 #include "base/time/tick_clock.h"
 
 namespace memory_pressure {
 
 #if defined(MEMORY_PRESSURE_IS_POLLING)
 
 // 100ms (10Hz) allows a relatively fast respsonse time for rapidly increasing
 // memory usage, but limits the amount of work done in the calculator.
 const int FilteredMemoryPressureCalculator::kMinimumTimeBetweenSamplesMs = 100;
 
@@ skipping 72 matching lines @@
     cooldown_start_time_ = now;
     cooldown_high_tide_ = level;
   }
 
   return current_pressure_level_;
 }
 
 #endif  // defined(MEMORY_PRESSURE_IS_POLLING)
 
 }  // namespace memory_pressure